NSV

BUSINESS

Noise · Vibration Diagnostics

Detailed Diagnostics

NSV conducts precise measurement and diagnostics of noise and vibration sources—such as intermediate mechanical rooms, rooftop equipment, roads, and railways—to accurately analyze the causes of potential complaints and human impact, providing optimized solutions tailored to each situation.

Diagnostic
Objectives and
Expected Outcomes

  1. 1 Current Condition Assessment
    1. Measurement of current conditions in accordance with relevant regulations and testing standards
    2. Assessment of noise and vibration levels from equipment, roads, railways, and subways during operation
  2. 2 Cause Identification
    1. Identifying major transmission paths through on-site investigation
    2. Selecting primary noise and vibration sources through frequency analysis
  3. 3 Optimal Measures
    1. Designing optimal measures tailored to the characteristics of each noise and vibration source
    2. Pre-construction consultation, including feasibility review

Process Steps

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STEP 01
Measurement

We identify the baseline noise and vibration conditions through on-site investigation.

  • Identifying current on-site noise conditions
  • Surveying areas expected to be affected
  • Selecting major noise sources
STEP 02
Frequency Response Analysis

We analyze the characteristics and root causes of noise and vibration based on actual measured data.

  • On-site noise and vibration measurement
  • Waveform and frequency characteristic analysis
  • Identifying peak frequencies
  • Identification of Noise & Vibration Source Characteristics from Equipment
STEP 03
Characteristic Analysis & Assessment

Based on the analysis results, we evaluate potential impact and determine whether mitigation measures are required.

  • Comparison and Evaluation of Frequency Characteristics Between Assessment Points and Target Equipment
  • Evaluating the need for mitigation measures

Diagnostic Items

  • 1 Room noise measurement

    We measure the impact of noise generated by mechanical rooms and equipment on adjacent residential and office areas, and evaluate the noise characteristics and compliance with applicable standards.

  • 2 Outdoor noise

    We measure the impact of external noise sources—such as factories, construction sites, and subway ventilation shafts—on surrounding areas and residential zones, and analyze the extent of noise propagation.

  • 3 Building Vibration measurement

    We predict vibration and structure-borne noise impacts on buildings located near subway lines and measure vibration levels at key locations expected to be affected.

  • 4 Equipment vibration measurement

    We analyze frequency response and vibration transmission characteristics during equipment operation, and compare dynamic displacement and transmissibility with and without vibration isolation.

  • 5 FRF measurement and mode features

    We analyze frequency characteristics and foundation vibration in areas with significant vibration impact and evaluate mode shapes and the effectiveness of vibration isolation.